[ENHANCEMENT] Make mapping function in DatasetRecords.log compatible with multiple attributes

[burtenshaw]

What

It is not possible to use the mapping parameter in the log method to assign one column of the incoming dataset to multiple Argilla attributes.

why

This impacts text generation datasets where the annotator is given a TextQuestion and asked to correct one of the fields. I.e. a prompt or response.

how

The problem is caused by the fact that we use a dictionary to define the mapping. This could be remedied by reversing the dictionary.

what now

You can get round this by: 1. renaming the columns in the dataset 👎 2. iterating over the dataset and defining rg.Record.